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Device and method for mineralizing low-concentration carbon dioxide by solid waste

A solid waste, carbon dioxide technology, applied in the removal of solid waste, chemical instruments and methods, transportation and packaging, etc., can solve the problems of reduced economic benefits, enhancement, and low strength of mineralized building materials, and achieve high cost savings and Corresponding energy consumption, ensuring product quality, and strengthening the effect of product strength

Active Publication Date: 2022-03-22
江苏集萃功能材料研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN108340480B discloses a method of using carbon dioxide cascade mineralization to maintain concrete blocks. Although this method solves the problem of CO 2 The overall utilization rate of gas is low, but its gas source is industrial grade CO 2 (99.5%) or carbon dioxide gas after carbon capture and desorption. On the one hand, the current price of industrial grade carbon dioxide is relatively high, and the cost of carbon capture and desorption is relatively high, which greatly reduces the economic benefits of mineralized building materials; on the other hand, high Concentrated carbon dioxide gas will react violently with solid waste at the initial stage of the reaction, causing a large number of microcracks inside the block, which is not conducive to the strengthening of the strength of building products
In addition, the patent CN 113561303 A discloses a CO 2 Device and method for mineralizing and curing concrete blocks, the method improves low concentration CO 2 Mineralization efficiency, but the strength of its products is low, and continuous production cannot be realized, there are a series of problems such as long inefficient reaction silence time, it is difficult to realize large-scale production application

Method used

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  • Device and method for mineralizing low-concentration carbon dioxide by solid waste
  • Device and method for mineralizing low-concentration carbon dioxide by solid waste
  • Device and method for mineralizing low-concentration carbon dioxide by solid waste

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Effect test

Embodiment 1

[0036] A device for mineralizing low-concentration carbon dioxide from solid waste, such as figure 1 , including successively connected gas storage tanks, boosters, gas distribution bags, multiple sets of mineralization reactors with heating coils and gas-liquid heat exchangers. Each group of mineralization reaction kettles includes two parallel and connected A kettles and B kettles, and a communication valve is provided between the connected mineralization reaction kettles to facilitate subsequent connection or closure of the communication of flue gas in the reaction kettles.

[0037] Among them, the outlet of the gas storage tank is connected with the inlet of the supercharger, and the outlet of the supercharger is connected with the inlet of the gas distribution bag for replenishing gas at any time. The gas inlet of the liquid heat exchanger is connected with the outlets of multiple groups of mineralization reaction kettles. The cold heat transfer oil enters the gas-liquid...

Embodiment 2

[0039] A method of mineralizing low-concentration carbon dioxide from solid waste, such as figure 2 ,details as follows:

[0040] (1) Place the compacted green body in the mineralization reaction kettle A and then close the reaction kettle, and fill the A kettle (i.e., the gas delivery kettle) with flue gas, wherein the flue gas includes 12.71mol% carbon dioxide and 75.88mol% nitrogen , 6.23mol% water vapor, 5.18mol% oxygen;

[0041] (2) One-stage curing: maintain the reaction temperature at 30°C, the reaction pressure at 0.3MPa, and cure for 1 hour; fill the green body into the B kettle (that is, the gas receiver) while reacting in the A kettle;

[0042] (3) Two-stage curing: continue to feed flue gas into kettle A, raise the temperature, maintain the reaction temperature at 60°C, and the reaction pressure at 1.2MPa, and cure for 1 hour;

[0043] (4) After the filling of the B kettle (gas receiving kettle) is completed, close the valve of the B kettle, and then connect wit...

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Abstract

The invention relates to the field of waste treatment and carbon dioxide mineralization utilization, in particular to a method for rapidly fixing carbon dioxide by using bulk solid waste and application of the method. The device for mineralizing the low-concentration carbon dioxide in the solid waste comprises a gas storage tank, a supercharger, a gas distributing bag and a plurality of groups of mineralization reaction kettles with heating coils which are connected in sequence, and an outlet of the gas storage tank, an inlet of the supercharger, an outlet of the supercharger, an inlet of the gas distributing bag, an outlet of the gas distributing bag and inlets of the plurality of groups of mineralization reaction kettles are connected in sequence. The device and the method are low in cost, efficient resource utilization is achieved, mineralization of low-concentration carbon dioxide gas is achieved, and meanwhile internal defects of mineralized products are greatly reduced.

Description

technical field [0001] The invention relates to the fields of waste treatment and carbon dioxide mineralization utilization, and more particularly relates to a device and method for mineralizing low-concentration carbon dioxide from solid waste. Background technique [0002] Climate change is a major global challenge of our time. In response to this problem, my country has proposed the goals of carbon peaking by 2030 and carbon neutrality by 2060. Carbon capture, utilization and storage (CCUS), as an emission reduction solution applicable to large-scale carbon emission sources and the only technical means with a chance to achieve negative emissions, is an important part of the global climate solution. [0003] Carbon dioxide mineralization utilization technology is a technology that has been studied more in the current CCUS technology system. Its principle is to use calcium and magnesium oxides with certain activity to introduce CO under certain temperature and pressure con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/20B09B3/70B09B5/00
CPCB09B5/00
Inventor 郦怡朱伟豪任天斌成铭钊
Owner 江苏集萃功能材料研究所有限公司
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